This part is a kind of semiconductor called A94-20.

Function of this product has Level Sensors Conductive.

Manufacturers : ETC

Image and pinout :

Some of the text within the PDF file :

Level Sensors Capacitive Type A94-20 • Level sensor for pools • 3 mm sensing distance • For wall mounting Product Description Hanging capacitive level sensor for (swimming) pools. For use with amplifiers H494 and S194. Ordering Key Type A94-20 Type Selection Ordering no. A 94-20 Specifications Rated operational voltage Rated operational current Active Inactive Frequency of operating cycles (f) Indication for output ON 7,5-9 VDC through 220 Ω < 8,0 mA > 2,5 mA 10 Hz No Rated operating distance Environment Degree of protection Operating temperature Storage temperature Housing material Cable 3 mm ±1 mm IP 67 -25º to +70ºC (-13º to +158ºF) -40º to +85ºC (-40º to +185ºF) Thermoplastic polyester PVC, 5 m Dimensions Wiring Diagram BN (GR) 220 Ω 8,2 V [ ... ]

A94-20 PDF Datasheet Download